I, too, am new to flock keeping, and live in Maine. I grew up on a dairy farm where we had hens in my youngest years. They were my grandmother's flock and when she died, we had no more flock. I have some memories of those years. The responsibility for life and death of animals is a comfortable mantle for me.
I have a coop and a large fenced area completed. I will build a roofed run in the Spring. I am deciding on some of the amenities for the coop like an automatic door, feeder and waterer. I will wait until Spring to acquire chicks. My choice is Wyandottes. I like their style, they are suited to the cold weather, and there is a local breeder where I will acquire the chicks.
I don't think there is a wrong choice in all the recommendations of the experienced people who have advised you. There seems to be many choices that will fulfill the backyard flock needs in our cold climate.
I am like you, excited to learn, excited to have the birds around.
PS. My son had a pitbull who was a wonderful dog. He came to a natural end this year after a 13 year run with family love, good food, and exercise. He was a "baby", and that is what we called him, Baby. He loved to snuggle, he was protective of his family, loved to be under the covers and sleep warmly, he got along with two other dogs that lived with him. We never witnessed the stereotyped aggressive behavior that other pits exhibit. We miss him.
Your pit is very nice looking. His pert, cocky expression reminds me of Baby. I am sure he will add happiness to your life. Life is better when you have a dog.